chambers



@lititrbrv 'tatts Beirat @fitta J4. L. CHA MBERS, 0l*1 BROOKLYN; NEWYORK.l

Y. Letters Patent Nb. 70,409, dated November 5, 1867.

IMPROVEMENT IN REGISTER-PABLOGK @Le Stintino infant it in ilgrst ttttctsintent mit uniting pnt at tigo smite.

TO ALL WII'OM IT MAY CONGER-N:

Beit known that I, J.L. CHAMBERS, of the city of Brooklyn, county ofKings, and State of New York,

have invented certain new and useful improvements in Tablet-Locks forMnil-l3ags, Freight Gars, &c.; and I` do hereby declare that tl1 crfollowing isa full, clear, andexact description ot' the same, referencebeing hadto the annexed drawings,` and to the letters of referenceVmarked thereon` mnking part of this specification, in whichv i Figure 1.is a-plan.view of thc lock, the face-plate being removed, as well asthe tumblers and main boit, onlyI leaving thatportionof the mechanismwhich is permanently attached to the bottom of the case.

Figure 2 is a plan view oi" theabove, with the main bolt attached, andalso side view of the main bolt.

Figure Seis a plan view of thelock, the face being removed, and showingthe entire mechanism.

Figure 4 is a plan lview of lockwith tablet attached.

Figure 5 is a plan view of the lock with tablet partiallyV withdrawn.

Figure 6 is a sidersectional View of No. 1.

Figure 7 is a plan view of one of the series of tumblers.

Figure 8 is a plan and side view of the lower b olt; and` Figure 9 is u.plan view of key.. i v

lThe nature of my invention consists in constructing a lock with twoindependent bolts, which are so arranged that theyaet together,simultaneously locking both the h'asp and the bottom lock, said boltsbeing operated by a series of` tumblers, which are worked by means of ailat key. f j

My invention also consists in constructing a tablet-lock. On the face ofthe lock, by-means of flanges, having projecting lips or otherequivalent device, I arrange a suitable frame to receive the tablet.Three sides of this frame are permanently secured to the face of thelock, while the bottom is slotted, in order to allow of the freeinsertion and withdrawal of the tablet, as occasion may require. Theslot in the lower portion .of the tablet-frame is entirely closed, bymeans ofthe bottom of the lock, so thatwhen the lock is fastened thetablet is permanentlyI secured in position, and cannot be interfered ortampered with until the lock 'is again unfastened, which removes thebottom-of the'lock from the slot, leaving the latter perfectly free.

In order to enable others skilled in the art to make and use myinvention, I'wiil proceed to describe its con-- struction and operation.i v

A is the lock-case, which is constructed in the usual manner. To theeaseA is secured the hasp Jl The hasp .I is furnished with a slot, .7',which receives the main bolt, which secures the hasp when the lock isfastened.v To the bottom of the case A is permanently attached -the bossE. The lower portion of this boss E is perfectly straight, and serves asavguide for the lower bolt C, which works between the boss E and innereasing A. On this holt C there is a'lraised ledge, c, by means of whichthe bottom I is held in -position when-the lock is fastened, the bottomI being provided with a hasp or catch, t', through which passes theledge c. This bottom plate I is firmly secured to the lock, and isfurnished .with a small spring, o, the object of which is to throw thebottom I out of position the moment the lock is unfastened. To thebottom of the case A, by means of the pivot-bolt d, is attached thehasp-dog or check D. This pivot-bolt d projects su'iciently far abovethe dog D to furnish a suitable bearing for the unattached endr of thesprings Z, which are secured tothe tumblers F. The cheek or dog D isprovided with a recess, 71, so arranged as to receive the boss b', whichis on the main bolt B. Motion is impartedto the dog D by means ofthespring d', one end of which is permanently attached to the dog, whilethe free end rests against the upper portion of the boss E. On the upperface of the boss E there: is a stump,

c, whiehreeeives and on which works themain bolt B. This main bolt B isprovided with a boss, Z1', as already stated, which rests in the recessL when the lock is unfastened, but whose projecting head enters theslotj when the lock is'fastened, and securely holdsthe hasp J. It willbe observed that a. space only suicientto allow of the free action ofthe bolt B is left between its upper edge and the lock-case. The objectof this is, if an attempt should be made to force the hasp when the lockis fastened, the bolt will be b'rought in contact with the case, thusfreeing the bolt of much of the strain, transferring the same to thecase. There is attached to the main bolt I3 a spring, lc, the free endof which rests against the side of the case. The tendency-of this springis to retain thcbolts in a closed condition until'sueh time as thetumblers are acted upon by the key K. The main 70eme bolt B is alsoprovided with a catchfchcele, lI1, anda slot, g. y In this slot g entersand works the stump a', which is secured to the upper head of the boltC, and by means of which, acting on a principle similar to the cam, an

alternating motion is imparted to the bolt C,`the direction of whoseaction is by this means'invariabl-y con# trolled by and is simultaneouswith the action of the main bolt B. F FF are tuinblers, which nreattached to and revolve upon the pin j", which is secured-...to thebottom of the case A. These tumblers are each provided with a spring, e,one end of which is'irnnlyattached, 'to the tumbler, Vwhile the otherend rests against the bolt d. The position of these tumblers,exceptwhenected upon by the key, as well as the entire mechanism, is asshown in fig. 3. On the face-plate of the lock there4 are formed ythreeanges, one at the top'und one on each side, leaving the bottom open. Onthese flanges resttheframe m, projectingvsutiieiently far lto form, asit were, inner lips to the langes.- This frame'm also projectssufficiently far ovcrthe lower end of the lock to completely `cover thebottom plate when the lock is fastened. By means of the lslot betweenthe frame and the face-plate, the tablet 'l can readily be inserted andwithdrawn. But so soon as the lock is fastened, the bottom plate Icompletely closes the slot, and renders it impossible to interfere withthe tablet, unless the look be opened.

The operation of' my invention is as follows: I use "a flat key, c, ofthe form shown in fig. 9. 'ihe tablet T being inserted, as shown infigs. land 5, the key enters the hole z', and isvbrought in immediatecontact with thc tumblers, which are forced until the catch-check Ab'hasentered the slotf of each tumbler; the main bolt 13 is then moved, whichgradually withdraws the bolt-Ahead out of the slot j, and at the sametime, by means ot the slot g and stump c, forces the bolt C back, whichwithdraws the flange c on the bolt' C out of the slot z' of the bottomI. As soon as the bolt-head of the main bolt B, and theuflange c ofthe-lower bolt C are free of the slotsj and I of the hasp J and vbottomplate I, the recoil of the'spring d', attached' to theutlog-"D,for'eesthe dog .against the hasp with sutlicent force to drive the haspentirelyclear of the opening a,.while at the same time the spring othrows the bottom plate I entirely outfot' its former position, asclearly shown niig. 1, when the tablet can be withdrawn and reversed,or-a. new one inserted, as occasionmay require.

Having thus fully described my invention, what I claim therein as new,and which I desire to secure by Letters Patent, is- I f 1. Constructinga lock with two independentbolts, which are so arranged as to acttogether, simultaneously locking both the hasp and bottom plate ofthelock, said bolts being operated by a series of tumblers, which areworked by means of a fiat key, substantially as described.

2. Securely locking the tablet in position by means of the bottom plateI, substantially as described. In testimonywhereofI have signed my nameto this specification in the presence of two subscribing witnesses.

K J. L. CHAMBERS. Witnesses:

JOHN S. HoLLINcsnnAD, JonND. BLoon.

